Multi-chambered electrochemical cell for carbon dioxide removal

Patent metadata

Field	Value
Publication number	US-12203184-B2
Application number	US-202318223460-A
Country	US
Kind code	B2
Filing date	Jul 18, 2023
Priority date	Jul 18, 2022
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

A system for a multi-chambered electrochemical cell for carbon dioxide removal includes an electrochemical cell. The electrochemical cell includes an anodic chamber at a first end of the electrochemical cell, which includes an anode. The electrochemical cell includes an acid swing chamber adjacent to the anodic chamber and separated by a cation exchange membrane. The electrochemical cell includes a desalination chamber separated from the acid swing chamber by a anion exchange membrane. The electrochemical cell includes a base swing chamber in fluid communication with the acid swing chamber and the desalination chamber. The base swing chamber is adjacent to the desalination chamber and separated by a cation exchange membrane. The electrochemical cell includes a cathodic chamber at a second end of the electrochemical cell, the cathodic chamber comprising a cathode, wherein the cathodic chamber is adjacent to the base swing chamber and separated by a second anion exchange membrane.

First claim

What is claimed is:

1. A system for carbon dioxide removal comprising:
a first electrochemical cell comprising:
a first acid swing chamber disposed at a first end of the first electrochemical cell;
a first base swing chamber disposed at a second end of the first electrochemical cell and in fluid communication with the first acid swing chamber;
a first anodic chamber, comprising an anode, disposed adjacent to the first end of the first electrochemical cell, separated therefrom by a first bipolar exchange membrane; and
a first cathodic chamber, comprising a cathode, adjacent to the second end of the first electrochemical cell, separated therefrom by a second bipolar exchange membrane;
a first salt chamber in fluid communication with the first acid swing chamber;
a second salt chamber in fluid communication with the first acid swing chamber and the first base swing chamber; and
a third salt chamber in fluid communication with the first base swing chamber,

wherein the first electrochemical cell, the first anodic chamber, and the first cathodic chamber are in fluid and electrical communication; and
the first salt chamber is configured to provide a first aqueous salt solution comprising a salt and CO 2 to the first acid swing chamber;
the second salt chamber is configured to transfer a second aqueous salt solution comprising the salt, CO 2 , and protons from the first acid swing chamber to the first base swing chamber; and
the third salt chamber is configured to remove a third aqueous salt solution comprising the salt from the first base swing chamber.

2. The system of claim 1 , wherein the system comprises a plurality of distinct electrochemical cells configured to be in fluid communication and electrically connected.

3. The system of claim 2 , wherein each of the plurality of distinct electrochemical cells are separated by a dividing bipolar membrane.

4. The system of claim 3 , wherein each of the plurality of distinct electrochemical cells is configured such that:
the first base swing chamber, disposed at the second end of the first electrochemical cell, is disposed adjacent to a first face of the dividing bipolar membrane;
a second acid swing chamber, disposed at a first end of a second electrochemical cell, is disposed adjacent to a second face of the dividing bipolar membrane; and
the first base swing chamber of the first electrochemical cell is in fluid communication with the second acid swing chamber of the second electrochemical cell.

5. The system of claim 2 , wherein the anode is disposed at a first end of the plurality of distinct electrochemical cells, and the cathode is disposed at a second end of the plurality of distinct electrochemical cells, and the cathode, the anode, and the plurality of distinct electrochemical cells form a closed circuit.

6. The system of claim 2 , wherein the plurality of distinct electrochemical cells comprises from about 2 to about 500 distinct electrochemical cells.

7. The system of claim 6 , wherein the plurality of distinct electrochemical cells comprises from about 100 to about 200 distinct electrochemical cells.

8. The system of claim 6 , wherein the plurality of distinct electrochemical cells comprises about 100 distinct electrochemical cells.

9. The system of claim 6 , wherein the plurality of distinct electrochemical cells comprises about 150 distinct electrochemical cells.

10. The system of claim 6 , wherein the plurality of distinct electrochemical cells comprises about 200 distinct electrochemical cells.

11. The system of claim 1 , wherein the system comprises at least one pump.

12. The system of claim 1 , further comprising a desalination chamber in fluid communication with the first acid swing chamber, the first base swing chamber, and the third salt chamber, wherein the third salt chamber is configured to remove the third aqueous salt solution from the base swing chamber and provide the third aqueous salt solution to the desalination chamber.

13. The system of claim 1 , wherein the first aqueous salt solution, the second aqueous salt solution, and the third aqueous salt solution each comprise a salt of at least one alkali element.

14. The system of claim 13 , wherein the salt of at least one alkali element is selected from LiOH, NaOH, KOH, Li 2 O, Na 2 O, K 2 O, and combinations thereof.

15. The system of claim 13 , wherein the salt of at least one alkali element is NaOH.

Assignees

• Univ California

Inventors

• Simonetti Dante
• Sant Gaurav
• Jassby David
• Tseng Yenwen
• Liotta Andrew
• Buttles John
• Haddad Maryam

Classifications

• Y02C20/40

  of CO2 · CPC title

• B01D61/445

  with bipolar membranes; Water splitting · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D53/326

  in electrochemical cells · CPC title

• C25B9/70

  Assemblies comprising two or more cells · CPC title